You'll know when its time. The water will boil with fish flipping and circuling and rubbing themselves against trees and bushes and shore. Watch shorelines in the morning that get sun first. The water will be warmer there and the fish will be most active there. Last year the spawn was a little harder to pinpoint because of the weather. This year should be fine.
A bad day bowfishing is better than a good day at work.
Team Piece of Carp
Team Bowlite Pro Staff